Pressure operated circuit controlling devices operable on relative movement between two elements



y 26, 1966 H. F. BLIVEN 3,263,040

PRESSURE OPERATED CIRCUIT CONTROLLING DEVICES OPERABLE ON RELATIVEMOVEMENT BETWEEN TWO ELEMENTS Filed June 29, 1964 2 Sheets-Sheet lInveninr Havaiy R'flZaw, .9

iida neg July 26, 1966 BLIVEN 3,263,040

PRESSURE OPERATED CIRCUIT CONTROLLING DEVICES OPERABLE ON RELATIVEMOVEMENT BETWEEN TWO ELEMENTS Filed June 29, 1964 2 Sheets-Sheet 212208271118 Haz afy BZBZivm,

J1 meg United States Patent PRESSURE OPERATED CIRCUIT CONTROLLINGDEVICES OPERABLE 0N RELATIVE MOVE- MENT BETWEEN TWO ELEMENTS Harry F.Bliven, 69 Hartford St., Newton Highlands, Mass. Filed June 29, 1964,Ser. No. 378,893 8 Claims. (Cl. 20061.64)

The present invention relates to pressure operated, cir' cuitcontrolling devices, each responsive to relative movement between twoelements.

While devices in accordance with the invention are adapted to a widerange of security and safety uses where detection of movement of apredetermined magnitude between two elements is required, the inventionis herein discussed primarily in connection with security, uses,typically where any undue pressure on a barrier, a door or window forexample, is to be detected to trigger an alarm.

The principal objective of the inventionis to provide a device to meetsuch generally indicated requirements and, in accordance with theinvention, this objective is attained by providingone element that ismovable relative to another element with .a first member movable intoand out of .an operative position relative to a second member with whichthe second member is provided, the second member having a holdingportion by which a connecting portion of the first member is held in theoperative position thereof. One of the portions has means yieldablyopposing movement between the elements when the above referred toportions are in engagement. A switch having open and closed positionsand located where the portions engage, is held in one position by theyieldable means until pressure on one of the elements results in theyielding of the yieldable means, the other switch position thenresulting.

A particular objective of the invention is to have the connectingportion of the first member include a sleeve as one contact of theswitch, the sleeve being electrically insulated from the first member bythe yieldable means and the first member constituting the other contactof the switch.

An additional particular objective of the invention is to have thesleeve in the form of a cup whose closed end is engaged by an inward-1ytapering tip at the end of but insulated from the connecting portion ofthe first member, the tip facilitating the relative pivoting movementbetween the connecting portion and the cup-shaped sleeve on movement ofthe first element relative to the second element.

In the accompanying drawings, there is shown an illustrative embodimentof the invention from which these and other of its objectives, novelfeatures, and advantages will be apparent.

In the drawings:

FIGURE 1 is a view of a door as seen from the boltcarrying side thereof,

FIGURE 2 is a fragmentary, sectional view of the bolt on an increasedscale, the section being taken lengthwise and vertically of the bolt,

FIGURE 3 is a fragmentary, sectional view of the door and the bolt onthe scale of FIGURE 2, the section being transverse and lengthwise ofthe bolt and door, the door being closed and the bolt being within itskeeper.

FIGURE 4 is a view similar to FIGURE 3 but with pressure so appliedagainst the door as to move the bolt relative to its keeper, and

FIGURE 5 is a section taken approximately along the indicated lines 55of FIGURE 2.

In the drawings, a door is connected by hinges 11 to one side of acasing 12 whose other side is provided with keeper 13 having a socket14.

A receiver 15, attached to one side of the door 10, slidably contains abolt 16 having a connecting portion 17 of reduced diameter. The receiver15 has a lengthwise slot 18 accommodating the neck 19 of a bolt handle20 by which the bolt 16 may be withdrawn into a retracted position andits neck 19 seated in a holding pocket 18A or advanced into its holdingposition in which its neck may be seated in a holding pocket 18B withthe connecting portion 17 entrant of the socket 14, if the door 10 isclosed.

The bolt 16 has an axial passage 21 extending from end-to-end thereof. Alead 22 extends through the bolt.

from a battery 23 and. a buzzer 24, both within a housing 25 secured tothe door 10. In the connecting portion 17, the lead 22 extends through ayieldable sleeve 26 of non-conductive stock with a bare end 22A inelectrical contact with a metal cup 27, dimensioned to fit freely withinthe socket 14. The open end of the cup 27 has a series of inwardlydisposed projections 27A held from contact with the connecting portion17 by the sleeve 26. At the extremity of the bolt portion 16A, there isa tip 28 seated against the closed end of the cup '27, the tip 28 beingof material that is a non-conductor of electricity.

With a device such as described, the door 10 is securely but releasablylocked and small movements be tween the door 10 and its casing 11 arepossible, even when thus locked, because the sleeve 26 is yieldable.When it yields to a predetermined extent, some of the projections 27Aengage the bolt closing the circuit so that the buzzer 24, or otheralarm, is energized. The sleeve 26 as shown as of a resilientlyyieldable material but it may be frangible thus affording physicalevidence of the application of a pressure of a predetermined valueagainst the door. In either event, the sleeve is responsive to force ofa predetermined magnitude which may be slight or substantial, asrequired to meet the needs of any particular installation. While thebolt and its receiver are shown as carried by the door and the keepersecured to the casing, this arrangement may be reversed. The batterypowered buzzer 24 is, of course, but one of many alarm systems that maybe employed.

I claim:

1. A pressure operated, circuit controlling device to respond tomovement between two elements, said device including a first member inthe form of a bolt attachable element and including a keeper portion,one portion being I entered within the other portion in said operativeposition, a yieldable sleeve carried by one member portion and yieldablyopposing movement between said elements in said operative position, anda switch having open and closed positions, one contact of said switchbeing a part of the sleeve carrying portion and the other contact beingheld to establish one switch position by said sleeve until pressure onone of said elements results in the yielding of said sleeve, the otherswitch position then resulting.

2. The device of claim 1 in which the sleeve carrying portion is part ofthe bolt portion.

3. The device of claim 1 in which the sleeve carrying portion is part ofthe keeper portion.

4. The device of claim 1 in which one switch contact surrounds theother.

5. A pressure operated, circuit controlling device to respond tomovement between two elements, said device including a first member inthe form of a bolt attachable to one element for sliding movementrelative thereto into and out of an operative position relative to theother element and a second member attachable to said other element andincluding a keeper portion, a portion of said bolt being entered withinsaid keeper portion in mate to the first member disposed towards thefirst named contact in the direction of movement between the elementsand held to establish one switch position by said sleeve until pressureon one of said elements results in the yielding of said sleeve, theother switch position then resulting.

6. A pressure operated, circuit controlling device to respond tomovement between two elements, said device including a first member inthe form of a bolt attach-able to one element for sliding movementrelative thereto into and out of an operative position relative to theother element, said bolt being a conductor of electricity and a secondmember attachable to said other element and including a keeper, aportion of said bolt being entered within said keeper portion in saidoperative position, a sleeve carried by said bolt portion, said sleeveincluding a yield-able inner part yieldably opposing movement betweensaid elements in said operative position, said inner part being of stockthat is a non-conductor of electricity,

said sleeve also including an outer part that is a conductor ofelectricity and that is held from contact with said bolt by said innerpart, and a switch having open and closed positions, one contact of saidswitch being the bolt and the other contact being the outer part of saidsleeve, said'contacts being held apart by said inner sleeve portionuntil pressure on one of said elements results in the yielding of saidsleeve.

7. The device of claim 6 in which the bolt has a passage extending fromend-to-end thereof and an insulated conductor extends therefrom and isconnected to the outer part of the sleeve.

8. The device of claim 6 in which the keeper portion is a socket and thebolt has .a rounded end cap engaging the bottom of the socket in theoperative bolt position.

References Cited by the Examiner UNITED STATES PATENTS 956,580 5/1910Howard ZOO-61.68 2,660,632 11/ 1953 Makishima. 2,822,451 2/1958 HolmesZOO-61.08

BENJAMIN DOBECK, Acting Primary Examiner.

BERNARD A. GILHEANY, Examiner,

J. J. BAKER, Assistant Examiner.

1. A PRESSURE OPERATED, CIRCUIT CONTROLLING DEVICE TO RESPOND TOMOVEMENT BETWEEN TWO ELEMENTS, SAID DEVICE INCLUDING A FIRST MEMBER INTHE FORM OF A BOLT ATTACHABLE TO ONE ELEMENT FOR SLIDING MOVEMENTRELATIVE THERETO INTO AND OUT OF AN OPERATIVE POSITION RELATIVE TO THEOTHER ELEMENT AND A SECOND MEMBER ATTACHABLE TO SAID OTHER ELEMENT ANDINCLUDING A KEEPER PORTION, ONE PORTION BEING ENTERED WITHIN THE OTHERPORTION IN SAID OPERATIVE POSITION, A YIELDABLE SLEEVE CARRIED BY ONEMEMBER PORTION AND YIELDABLY OPPOSING MOVEMENT BETWEEN SAID ELEMENTS INSAID OPERATIVE POSITION, AND A SWITCH HAVING OPEN AND CLOSED POSITIONS,ONE CONTACT OF SAID SWITCH BEING A PART OF THE SLEEVE CARRYING PORTIONAND THE OTHER CONTACT BEING HELD TO ESTABLISH ONE SWITCH POSITION BYSAID SLEEVE UNTIL PRESSURE ON ONE OF SAID ELEMENTS RESULTS IN THEYIELDING OF SAID SLEEVE, THE OTHER SWITCH POSITION THEN RESULTING.